JP3156763U - Fitting for sprinkler head connection for water supply connection - Google Patents

Fitting for sprinkler head connection for water supply connection Download PDF

Info

Publication number
JP3156763U
JP3156763U JP2009007770U JP2009007770U JP3156763U JP 3156763 U JP3156763 U JP 3156763U JP 2009007770 U JP2009007770 U JP 2009007770U JP 2009007770 U JP2009007770 U JP 2009007770U JP 3156763 U JP3156763 U JP 3156763U
Authority
JP
Japan
Prior art keywords
joint
sprinkler head
water
water supply
passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP2009007770U
Other languages
Japanese (ja)
Inventor
悟 寺本
悟 寺本
Original Assignee
菱樹商事株式会社
悟 寺本
悟 寺本
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 菱樹商事株式会社, 悟 寺本, 悟 寺本 filed Critical 菱樹商事株式会社
Priority to JP2009007770U priority Critical patent/JP3156763U/en
Application granted granted Critical
Publication of JP3156763U publication Critical patent/JP3156763U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Landscapes

  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)

Abstract

【課題】 部品点数を削減した簡単な構造によって、停滞水が給水管に逆流するのを確実に防止できる水道連結用スプリンクラーヘッド接続用の継手を提供する。【解決手段】継手1は、上水道本管から分岐された給水管5と、給水管5の途中に設置したT型継手2と、T型継手2とスプリンクラーヘッド8の入口8aとを接続する継手ユニット3とを備える。継手ユニット3の上流側の端部30に、スプリンクラーヘッド8閉塞時の1次圧P1と2次圧P2との平衡状態で付勢部材の付勢により閉止されて継手ユニット3およびスプリンクラーヘッド8内の停滞水が給水管5へ逆流を防止するとともに、スプリンクラーヘッド8開放時の2次圧P2の低下によって生じる1次圧P1と2次圧P2との差圧(P1>P2)で付勢部材の付勢に抗して開放されてスプリンクラーヘッド8の放水を許容する逆流防止手段12を備えている。【選択図】図2PROBLEM TO BE SOLVED: To provide a sprinkler head coupling joint for water supply connection capable of reliably preventing stagnant water from flowing back to a water supply pipe with a simple structure with a reduced number of parts. A joint 1 includes a water supply pipe 5 branched from a water supply main, a T-type joint 2 installed in the middle of the water supply pipe 5, and a joint for connecting the T-type joint 2 and an inlet 8a of a sprinkler head 8. Unit 3 is provided. In the joint unit 3 and the sprinkler head 8, the upstream end 30 of the joint unit 3 is closed by the urging force of the urging member in an equilibrium state of the primary pressure P 1 and the secondary pressure P 2 when the sprinkler head 8 is closed. Stagnation water prevents backflow into the water supply pipe 5 and is biased by the differential pressure (P1> P2) between the primary pressure P1 and the secondary pressure P2 generated by the decrease in the secondary pressure P2 when the sprinkler head 8 is opened. There is provided a backflow prevention means 12 which is opened against the urging force and allows the sprinkler head 8 to discharge water. [Selection] Figure 2

Description

本考案は、水道連結用スプリンクラーヘッド接続用の継手に係り、詳しくは、上水道本管から分岐されている一般住宅の給水管を利用した水道連結用スプリンクラー設備において、前記給水管とスプリンクラーヘッドとを接続する継手およびスプリンクラーヘッド内の停滞水が給水管に逆流するのを防止するようにした水道連結用スプリンクラーヘッド接続用の継手に関する。   The present invention relates to a joint for connecting a sprinkler head for water supply connection. More specifically, in a sprinkler facility for water connection using a water supply pipe of a general house branched from a main water main, the water supply pipe and the sprinkler head are connected. The present invention relates to a joint for connecting a sprinkler head for connecting water pipes and a sprinkler head for connecting water pipes which prevents stagnant water in the sprinkler head from flowing back to a water supply pipe.

水道連結用スプリンクラー設備は、上水道本管から分岐されて末端に取付けられた蛇口や水洗トイレのタンクに付設のボールタップなどの給水栓の開閉により水道水を流動または停止させる給水管と、この給水管の途中で該給水管とスプリンクラーヘッドとを接続する立ち下げ管を含む継手とを備えている。   The sprinkler equipment for water supply connection consists of a water supply pipe that flows or stops tap water by opening and closing a water tap such as a faucet that is branched from the main water main and attached to the end or a ball tap attached to the tank of a flush toilet. And a joint including a falling pipe for connecting the water supply pipe and the sprinkler head.

前記構成の水道連結用スプリンクラー設備では、火災発生時にスプリンクラーヘッドから自動的に放水して火災の抑制・消火を行い、初期消火に優れた効果を発揮することができる。また、平常時は、給水管の末端に取付けられている給水栓を開放することで、給水管内の水道水は給水栓から放水されて、飲用や炊飯、洗濯やバスタブあるいはトイレの水洗などに供給される。   In the sprinkler facility for water supply having the above-described configuration, water can be automatically discharged from the sprinkler head in the event of a fire to suppress and extinguish the fire, and can exhibit an excellent effect in initial fire extinguishing. Also, in normal times, by opening the water tap attached to the end of the water supply pipe, the tap water in the water supply pipe is discharged from the water tap and supplied for drinking, cooking, washing, washing in the bathtub or toilet, etc. Is done.

ところで、平常時では、前記立ち下げ管を含む継手内およびスプリンクラーヘッド内の水道水は循環しないので、立ち下げ管を含む継手内およびスプリンクラーヘッド内に汚濁した水、つまり停滞水が発生する。このような停滞水が給水管に逆流するのは衛生上好ましくないので絶対に避けるべきである。そのため、停滞水の発生を防止するように構成した水道連結用のスプリンクラーヘッドが提案されている(特許文献1参照)。   By the way, in normal times, tap water in the joint including the down pipe and the sprinkler head does not circulate, so that contaminated water, that is, stagnant water is generated in the joint including the down pipe and the sprinkler head. Such stagnant water flowing back into the water supply pipe is unfavorable for hygiene and should be avoided. Therefore, a sprinkler head for water supply connection configured to prevent the occurrence of stagnant water has been proposed (see Patent Document 1).

特開2007−29321号公報JP 2007-29321 A

前記特許文献1に記載されている技術を図5に示す、この図において、水道連結用のスプリンクラーヘッド100は、平常時、スプリンクラーヘッド100におけるヘッド本体101の導水口102を第2バルブ103で塞いでヘッド本体101内での死水(停滞水)の発生を防ぎ、火災発生時、第2バルブ103は感熱分解部分104の分解により降下して放水口105を開放する第1バルブ106の作動に伴って導水口102から降下して導水口102を開放するように構成されている。   The technique described in Patent Document 1 is shown in FIG. 5. In this figure, the sprinkler head 100 for water supply connection normally closes the water inlet 102 of the head body 101 in the sprinkler head 100 with the second valve 103. Thus, the occurrence of dead water (stagnation water) in the head main body 101 is prevented, and in the event of a fire, the second valve 103 descends due to the decomposition of the thermal decomposition portion 104 and the operation of the first valve 106 that opens the water outlet 105 is performed. The water guide 102 is configured to descend from the water inlet 102 and open the water inlet 102.

このように構成されている前記特許文献1に記載の技術によれば、T型継手107の分岐口108に接続されるヘッド本体101の導水口102が第2バルブ103で塞がれるので、水がヘッド本体101内に流入することがなく、スプリンクラーヘッド100内での死水(停滞水)の発生を防止することができる。また、火災発生時には、第2バルブ103は感熱分解部分104の分解により降下して放水口105を開放する第1バルブ106の作動に伴って導水口102から降下して導水口102を開放するので、放水による消火に支障を来すものではないとされている。   According to the technique described in Patent Document 1 configured as described above, the water inlet 102 of the head main body 101 connected to the branch port 108 of the T-shaped joint 107 is blocked by the second valve 103. Does not flow into the head main body 101, and the generation of dead water (stagnation water) in the sprinkler head 100 can be prevented. Further, in the event of a fire, the second valve 103 descends due to the decomposition of the thermal decomposition portion 104 and opens the water discharge port 105, so that the second valve 103 descends from the water conveyance port 102 and opens the water conveyance port 102 with the operation of the first valve 106. It is said that it will not hinder fire extinguishing due to water discharge.

しかし、前記特許文献1に記載の技術は、前記第2バルブ103の他に、第2バルブ103と第1バルブ106の間に介在して第2バルブ103を支持するボール109あるいは通水口110を有する第2バルブ103の弁座体111などを必要としているので、部品点数が多く、構造が複雑である問題点を有している。   However, the technique described in Patent Document 1 includes, in addition to the second valve 103, a ball 109 or a water passage 110 that is interposed between the second valve 103 and the first valve 106 and supports the second valve 103. Since the valve seat body 111 of the second valve 103 is required, the number of parts is large and the structure is complicated.

本考案は、このような問題を解決するものであって、その目的とするところは、部品点数を削減した簡単な構造によって、停滞水が給水管に逆流するのを確実に防止できる水道連結用スプリンクラーヘッド接続用の継手を提供することにある。   The present invention solves such problems, and its purpose is for water supply connection that can reliably prevent stagnant water from flowing back into the water supply pipe by a simple structure with a reduced number of parts. It is to provide a joint for connecting a sprinkler head.

前記目的を達成するために、本考案に係る水道連結用スプリンクラーヘッド接続用の継手は、上水道本管から分岐されて端末に取付けられた給水栓の開閉により水道水を流動または停止させる給水管が両端部に接続される第1通路および該第1通路から分岐された第2通路を備えるT型継手と、上流側の端部が前記T型継手の第2通路に接続され、下流側の端部がスプリンクラーヘッドの入口に接続される継手ユニットとからなり、前記給水管と前記スプリンクラーヘッドとを接続する水道連結用スプリンクラーヘッド接続用の継手において、
前記T型継手の第2通路と前記継手ユニットの上流側の端部のいずれかに、スプリンクラーヘッド閉塞時の1次圧と2次圧との平衡状態で付勢部材の付勢により閉止されて、継手ユニットおよびスプリンクラーヘッド内の停滞水が前記給水管へ逆流を防止するとともに、
スプリンクラーヘッド開放時の2次圧の低下によって生じる1次圧と2次圧との差圧で前記付勢部材の付勢に抗して開放されてスプリンクラーヘッドの放水を許容する逆流防止手段を備えていることを特徴としている。
In order to achieve the above object, the sprinkler head connection joint according to the present invention has a water supply pipe for flowing or stopping tap water by opening and closing a water tap branched from a water supply main pipe and attached to a terminal. A T-type joint including a first passage connected to both ends and a second passage branched from the first passage; and an upstream end connected to the second passage of the T-type joint, and a downstream end The joint comprises a joint unit connected to the inlet of the sprinkler head, and in the joint for sprinkler head connection for water connection that connects the water supply pipe and the sprinkler head,
Either the second passage of the T-shaped joint or the upstream end of the joint unit is closed by the biasing member in a balanced state between the primary pressure and the secondary pressure when the sprinkler head is closed. The stagnant water in the joint unit and sprinkler head prevents back flow into the water supply pipe,
There is provided a backflow preventing means that is opened against the urging force of the urging member by the differential pressure between the primary pressure and the secondary pressure that is generated by the reduction of the secondary pressure when the sprinkler head is opened, and allows the sprinkler head to discharge water. It is characterized by having.

これによれば、水道連結用スプリンクラーヘッド接続用の継手の取付け作業は、まず、上水道本管に近い給水管の上流側に設けた止水栓を閉じた止水状態で、給水管にT型継手を接続し、つぎに、継手ユニットの上流側の端部をT型継手の第2通路に接続したのち、該継手ユニットの下流側の端部を天井に既設のスプリンクラーヘッドの入口に接続する手順によりなされる。このように水道連結用スプリンクラーヘッド接続用の継手を取付けた状態で、給水管末端の給水栓を開放すれば、給水管、T型継手、継手ユニットおよびスプリンクラーヘッドの内圧は大気圧に保持される。ここで、前記止水栓を開いて給水管に通水し、給水管末端の給水栓からの放水を確認して給水栓を閉じる。   According to this, the attachment work of the joint for connecting the sprinkler heads for water connection is first performed with a T-type in the water supply pipe with the water stop provided on the upstream side of the water supply pipe close to the water supply main pipe closed. Connect the joint, and then connect the upstream end of the joint unit to the second passage of the T-shaped joint, and then connect the downstream end of the joint unit to the inlet of the existing sprinkler head on the ceiling. It is done according to the procedure. When the water tap at the end of the water supply pipe is opened with the joint for connecting the sprinkler head for water connection in this way, the internal pressure of the water supply pipe, T-type joint, joint unit and sprinkler head is maintained at atmospheric pressure. . Here, the stop cock is opened, water is passed through the feed pipe, water discharge from the feed tap at the end of the feed pipe is confirmed, and the feed cock is closed.

一方、上水道本管の水道水が給水管に通水されることで、水道水の水圧がT型継手の第2通路と継手ユニットの上流側の端部のいずれかに備わっている逆流防止手段に1次圧として負荷される。1次圧が逆流防止手段に負荷された初期の状態では、逆流防止手段に負荷される2次圧は大気圧で前記1次圧よりも低いので、逆流防止手段は、1次圧と2次圧との差圧で付勢部材の付勢に抗して開放される。これにより、逆流防止手段の下流側の継手ユニットおよびスプリンクラーヘッド内の空気は水道水に置換され、置換された水道水の水圧が逆流防止手段に2次圧として負荷されることで1次圧と2次圧とが平衡し、前記付勢部材の付勢により逆流防止手段は閉止される。この場合、逆流防止手段の下流側の継手ユニットおよびスプリンクラーヘッド内に停滞水が発生するものの、この停滞水の給水管への逆流は逆流防止手段の閉止によって確実に防止される。   On the other hand, the tap water of the main water main is passed through the water supply pipe so that the water pressure of the tap water is provided in either the second passage of the T-shaped joint or the upstream end of the joint unit. Is loaded as the primary pressure. In the initial state in which the primary pressure is loaded on the backflow prevention means, the secondary pressure applied to the backflow prevention means is atmospheric pressure and lower than the primary pressure. Therefore, the backflow prevention means includes the primary pressure and the secondary pressure. It is released against the biasing force of the biasing member by the pressure difference from the pressure. Thereby, the air in the joint unit on the downstream side of the backflow prevention means and the sprinkler head is replaced with tap water, and the water pressure of the replaced tap water is loaded as a secondary pressure on the backflow prevention means. The secondary pressure is balanced and the backflow preventing means is closed by the biasing of the biasing member. In this case, although stagnant water is generated in the joint unit and sprinkler head on the downstream side of the backflow prevention means, backflow of the stagnant water to the water supply pipe is reliably prevented by closing the backflow prevention means.

すなわち、平常時において、給水管の末端に取付けられている給水栓を開放することで、給水管内の水道水は給水栓から放水されて、飲用や炊飯、洗濯やバスタブあるいはトイレの水洗などに供給される。このような状態下でも前記1次圧と2次圧の平衡状態が保持されて逆流防止手段は閉止されているので、前記停滞水が給水管へ逆流することはない。   In other words, in normal times, by opening the water tap attached to the end of the water supply pipe, tap water in the water supply pipe is discharged from the water tap and supplied to drinking, cooking rice, washing, washing in the bathtub or toilet, etc. Is done. Even in such a state, the equilibrium state of the primary pressure and the secondary pressure is maintained and the backflow prevention means is closed, so that the stagnant water does not flow back to the water supply pipe.

他方、火災発生時には、スプリンクラーヘッドから、まず前記停滞水が自動的に放水される。これにより、前記2次圧が低下するので、逆流防止手段は1次圧と2次圧との差圧で付勢部材の付勢に抗して開放されてスプリンクラーヘッドの放水を許容する。   On the other hand, when a fire occurs, the stagnant water is automatically discharged from the sprinkler head. As a result, the secondary pressure is lowered, so that the backflow prevention means is opened against the biasing force of the biasing member by the differential pressure between the primary pressure and the secondary pressure, thereby allowing the sprinkler head to discharge water.

すなわち、本考案に係る水道連結用スプリンクラーヘッド接続用の継手は、T型継手と、このT型継手とスプリンクラーヘッドとを接続する継手ユニットとからなり、給水管とスプリンクラーヘッドとを接続するとともに、停滞水が給水管へ逆流するのを確実に防止することができるものでありながら、T型継手の第2通路と継手ユニットの上流側の端部のいずれかに逆流防止手段を備えただけのものであるから、部品点数の削減と構造の簡略化を実現できる。   That is, the joint for connecting a sprinkler head for water supply according to the present invention comprises a T-shaped joint and a joint unit for connecting the T-shaped joint and the sprinkler head, and connects the water supply pipe and the sprinkler head, While it is possible to reliably prevent stagnant water from flowing back to the water supply pipe, it is only provided with a backflow prevention means at either the second passage of the T-type joint or the upstream end of the joint unit. Therefore, the number of parts can be reduced and the structure can be simplified.

また、前記継手ユニットは、前記T型継手の第2通路に接続される管状の第1継手と、スプリンクラーヘッドの入口に接続される管状の第2継手と、前記第1継手に上流側の端部が接続され前記第2継手に下流側の端部が接続される可撓管とを備えている。   The joint unit includes a tubular first joint connected to the second passage of the T-shaped joint, a tubular second joint connected to the inlet of the sprinkler head, and an upstream end of the first joint. And a flexible tube having a downstream end connected to the second joint.

これによると、可撓管の撓み作用によって管状の第2継手に大きい変位自由度が確保されるので、通常は、T型継手の第2通路に管状の第1継手を接続した後になされる天井に既設のスプリンクラーヘッドと管状の第2継手との芯合わせとそれに続く接続作業が容易になる。   According to this, since a large degree of freedom of displacement is ensured in the tubular second joint by the bending action of the flexible tube, the ceiling usually formed after the tubular first joint is connected to the second passage of the T-shaped joint. In addition, the centering of the existing sprinkler head and the tubular second joint and the subsequent connecting operation are facilitated.

本考案に係る水道連結用スプリンクラーヘッド接続用の継手は、前記逆流防止手段を、前記第2通路と前記第1継手のいずれかの内周に設けた弁座と、スプリンクラーヘッド閉塞時の1次圧と2次圧の平衡状態でスプリングの付勢により前記弁座に着座するとともに、スプリンクラーヘッド開放時の2次圧の低下によって生じる1次圧と2次圧との差圧で前記スプリングの付勢に抗して開放されてスプリンクラーヘッドの放水を許容する弁体とを備えた逆止弁によって構成することが望ましい。   A sprinkler head coupling joint for water supply according to the present invention comprises a valve seat provided with the backflow preventing means on the inner periphery of either the second passage or the first joint, and a primary when the sprinkler head is closed. The spring is urged by the spring in an equilibrium state of the pressure and the secondary pressure, and the spring is attached by the differential pressure between the primary pressure and the secondary pressure generated by the reduction of the secondary pressure when the sprinkler head is opened. It is desirable that the check valve is provided with a valve body that is opened against the force and allows the sprinkler head to discharge water.

これによれば、部品点数が少なく、構造が簡単な逆止弁の逆流防止作用によって、停滞水が給水管に逆流するのを確実に防止することができる。   According to this, it is possible to reliably prevent stagnant water from flowing back into the water supply pipe by the check valve preventing action of the check valve having a small number of parts and a simple structure.

また、本考案に係る水道連結用スプリンクラーヘッド接続用の継手は、前記T型継手の第2通路の軸線を、横に向けて前記継手ユニットの上流側の端部に接続される。   Moreover, the sprinkler head connection joint according to the present invention is connected to the upstream end of the joint unit with the axis of the second passage of the T-shaped joint facing sideways.

このように、T型継手の第2通路の軸線が横に向くことで、該第2通路の軸線を鉛直下向きにした構造と比較して、平常時において、第1通路から第2通路に一旦流入した水は、第1通路を流れる水の影響により再度第1通路に流出し易くなる。そのため、第2通路での滞留が回避されて第2通路に停滞水が発生しなくなるので、第2通路から第1通路および給水管へ停滞水が逆流することはない。   In this way, when the axis of the second passage of the T-shaped joint faces sideways, compared with the structure in which the axis of the second passage is vertically downward, the first passage is temporarily changed from the first passage to the second passage. The inflowing water easily flows out into the first passage again due to the influence of the water flowing through the first passage. Therefore, stay in the second passage is avoided and stagnant water does not occur in the second passage, so that stagnant water does not flow backward from the second passage to the first passage and the water supply pipe.

本考案に係る水道連結用スプリンクラーヘッド接続用の継手によれば、T型継手と、このT型継手とスプリンクラーヘッドとを接続する継手ユニットとからなり、給水管とスプリンクラーヘッドとを接続する水道連結用スプリンクラーヘッド接続用の継手において、T型継手第2通路と継手ユニットの上流側の端部のいずれかに逆流防止手段を備えただけのものであるから、部品点数を削減した簡単な構造によって、停滞水が給水管に逆流するのを確実に防止することができる。   According to the joint for connecting a sprinkler head for water connection according to the present invention, it comprises a T-type joint and a joint unit for connecting the T-type joint and the sprinkler head, and connects the water supply pipe and the sprinkler head. In the sprinkler head connection joint, the T-type joint second passage and the upstream end of the joint unit are only provided with a backflow prevention means, so a simple structure with a reduced number of parts is used. The stagnant water can be reliably prevented from flowing back into the water supply pipe.

本考案に係る水道連結用スプリンクラーヘッド接続用の継手の一実施形態を示す平面図である。It is a top view which shows one Embodiment of the joint for sprinkler head connection for water supply connections concerning this invention. 図1のII−II矢視図である。It is an II-II arrow line view of FIG. 図1の水道連結用スプリンクラーヘッドが設置されたスプリンクラー設備の配管系統図の一例である。It is an example of the piping system diagram of the sprinkler installation in which the sprinkler head for water supply connection of FIG. 1 was installed. 継手ユニットの一例を一部断面にして示す説明図である。It is explanatory drawing which shows an example of a coupling unit in a partial cross section. 従来例の断面図である。It is sectional drawing of a prior art example.

図1は本考案に係る水道連結用スプリンクラーヘッド接続用の継手の一実施形態を示す平面図、図2は図1のII−II矢視図、図3は図1の水道連結用スプリンクラーヘッドが設置されたスプリンクラー設備の配管系統図の一例である。   FIG. 1 is a plan view showing an embodiment of a joint for connecting a sprinkler head for water connection according to the present invention, FIG. 2 is a view taken along arrow II-II in FIG. 1, and FIG. 3 is a sprinkler head for water connection in FIG. It is an example of the piping system diagram of the installed sprinkler equipment.

図1〜図3において、水道連結用スプリンクラーヘッド接続用の継手1は、樹脂製のT型継手2と金属製の継手ユニット3とからなり、T型継手2における直線状の第1通路4の両端部に樹脂製の給水管5が挿入されて、シールテープおよび接着材(ともに図示せず)を使用して水密に接続されることで、給水管5の途中にT型継手2が設置される。そして、T型継手2における第1通路4の長手方向の中央部から直交して分岐された第2通路6は、横向き水平に指向させて継手ユニット3の上流側の端部30がシールテープを利用してねじ込まれて水密に接続され、継手ユニット3の下流側の端部31は、鉛直下向きに指向させて天井7に設置されている水道連結用スプリンクラーヘッド8の入口筒部8aがシールテープを利用してねじ込まれて水密に接続される。すなわち、水道連結用スプリンクラーヘッド接続用の継手1により、給水管5とスプリンクラーヘッド8とが水密に接続される。なお、T型継手2は金属製のものであってもよい。   In FIG. 1 to FIG. 3, a joint 1 for connecting water sprinkler heads is composed of a resin-made T-shaped joint 2 and a metal-made joint unit 3, and the linear first passage 4 of the T-shaped joint 2. The T-type joint 2 is installed in the middle of the water supply pipe 5 by inserting a water supply pipe 5 made of resin at both ends and making a watertight connection using a seal tape and an adhesive (both not shown). The And the 2nd channel | path 6 branched perpendicularly | vertically from the center part of the longitudinal direction of the 1st channel | path 4 in the T-shaped coupling 2 is made to orient horizontally horizontally, and the edge part 30 of the upstream of the coupling unit 3 uses a sealing tape. It is screwed in and connected in a watertight manner, and the downstream end 31 of the joint unit 3 is oriented vertically downward, and the inlet cylinder 8a of the sprinkler head 8 for water connection that is installed on the ceiling 7 is a sealing tape. It is screwed in using and is connected watertight. That is, the water supply pipe 5 and the sprinkler head 8 are connected in a watertight manner by the joint 1 for connecting the water sprinkler head. The T-shaped joint 2 may be made of metal.

図4に示すように、金属製の継手ユニット3は、上流側の端部30を構成するとともに、管継手として機能するステンレス鋼製のニップルからなる第1継手32と、下流側の端部31を構成するとともに、管継手として機能するステンレス鋼製のソケットからなる第2継手33と、立ち下げ管として機能する薄肉ステンレス鋼管製の可撓管34とを備えており、可撓管34の上流側端部34aは、第1継手32の下流側開口部に挿入されて、溶接またはろう付けにより水密に接続され、下流側端部34bは、第2継手33の上流側開口部に挿入されて、溶接またはろう付けにより水密に接続されている。そして、図2に示すように、可撓管34は、第1継手32を介してT型継手2の第2通路6に接続され、また、第2継手33を介して水道連結用スプリンクラーヘッド8の入口筒部8aに接続されることで、上流側端部34aと下流側端部34bの間にある蛇腹状の可撓部34cが下向きに撓曲されている。   As shown in FIG. 4, the metal joint unit 3 constitutes an upstream end 30, a first joint 32 made of a stainless steel nipple that functions as a pipe joint, and a downstream end 31. And a second joint 33 made of a stainless steel socket that functions as a pipe joint, and a flexible pipe 34 made of a thin stainless steel pipe that functions as a falling pipe, upstream of the flexible pipe 34. The side end 34a is inserted into the downstream opening of the first joint 32 and connected in a watertight manner by welding or brazing, and the downstream end 34b is inserted into the upstream opening of the second joint 33. , Watertight connected by welding or brazing. As shown in FIG. 2, the flexible pipe 34 is connected to the second passage 6 of the T-shaped joint 2 through the first joint 32, and the water connection sprinkler head 8 through the second joint 33. As a result, the bellows-like flexible portion 34c between the upstream end portion 34a and the downstream end portion 34b is bent downward.

図3に示すように、給水管5は上水道本管9から分岐されており、その端末に取付けられている各給水栓10を開放することで、給水管5内の水道水は各給水栓10から放水されて、飲用や炊飯、洗濯やバスタブあるいはトイレの水洗などに供給される。なお、上水道本管9から給水管5への通水・遮断は、止水栓11の開閉によってなされる。   As shown in FIG. 3, the water supply pipe 5 is branched from the water main main pipe 9, and the tap water in the water supply pipe 5 is supplied to each water tap 10 by opening each water tap 10 attached to the terminal. The water is discharged from the water and supplied for drinking, cooking rice, washing, washing the bathtub or toilet. In addition, the water supply / cutoff from the water supply main 9 to the water supply pipe 5 is performed by opening and closing the stop cock 11.

図4に示すように、継手ユニット3における上流側の端部30を構成する第1継手32の内部には、逆止弁からなる逆流防止手段12が備わっている。この逆流防止手段12は、継手ユニット3および水道連結用スプリンクラーヘッド1側から給水管5への停滞水の逆流を防止するためのもので、第1継手32の入口付近の内周に取付けられた樹脂製環状の弁座13と、この環状の弁座13に接離する弁頭14と、弁頭14の半径方向中心部に連設されて弁座13から離れる方向にのびる弁棒15とを備えた樹脂製の弁体16と、第1継手32の入口よりも少し奥側で環状の弁座13に対向して第1継手32の内周に取付けられた樹脂製の弁体保持部材17と、弁体16の弁頭14と弁体保持部材17の外周環状部17aとの間に介在して、弁体16を常時環状の弁座13方向に付勢して着座させるステンレス鋼製のスプリング18とを備え、弁棒15は弁体保持部材17の中心筒部17bに挿入して軸方向の摺動を自在に保持されている。   As shown in FIG. 4, the backflow prevention means 12 which consists of a non-return valve is provided in the inside of the 1st coupling 32 which comprises the edge part 30 of the upstream in the coupling unit 3. As shown in FIG. This backflow prevention means 12 is for preventing the backflow of stagnant water from the joint unit 3 and the water sprinkler head 1 for water connection to the water supply pipe 5 and is attached to the inner periphery of the first joint 32 near the inlet. A resin-made annular valve seat 13, a valve head 14 that is in contact with and away from the annular valve seat 13, and a valve rod 15 that is connected to the center of the valve head 14 in the radial direction and extends away from the valve seat 13. The resin valve body 16 provided and the resin valve body holding member 17 attached to the inner periphery of the first joint 32 so as to face the annular valve seat 13 slightly behind the inlet of the first joint 32. And a stainless steel plate that is interposed between the valve head 14 of the valve body 16 and the outer peripheral annular portion 17a of the valve body holding member 17 to urge the seat 16 toward the annular valve seat 13 at all times. A spring 18, and the valve stem 15 is attached to the central cylindrical portion 17 b of the valve body holding member 17. It is freely hold the slide in the axial direction by entering.

前記スプリング18のばね定数は、弁体16上側の水圧(1次圧P1)と弁体16下側の水圧(2次圧P2)との平衡状態で弁頭14を弁座13に着座させて閉止するとともに、水道連結用スプリンクラーヘッド8開放時の2次圧P2の低下によって生じる1次圧P1と2次圧P2との差圧(P1>P2)で弁頭14が弁座13から離れて開放される値に設定されている。   The spring constant of the spring 18 is such that the valve head 14 is seated on the valve seat 13 in an equilibrium state between the water pressure above the valve body 16 (primary pressure P1) and the water pressure below the valve body 16 (secondary pressure P2). The valve head 14 is separated from the valve seat 13 by the pressure difference (P1> P2) between the primary pressure P1 and the secondary pressure P2 generated by the decrease in the secondary pressure P2 when the water connection sprinkler head 8 is opened. It is set to the value to be released.

また、図2に示す水道連結用スプリンクラーヘッド8としては、水道水の水圧および流量に適応したものが適用され、その仕様の一例として流量が30リットル/毎分で最低使用圧力が0.05MPa〜0.1MPaのものが適用可能である。   In addition, as the sprinkler head 8 for water supply connection shown in FIG. 2, one adapted to the water pressure and flow rate of tap water is applied, and as an example of the specification, the flow rate is 30 liters / minute and the minimum working pressure is 0.05 MPa to The thing of 0.1 MPa is applicable.

前記構成の水道連結用スプリンクラーヘッド接続用の継手1の取付け施工は、まず、止水栓11を閉じた止水状態で、T型継手2における直線状の第1通路4の両端部に給水管5を挿入して水密に接続することで、給水管5の途中に複数のT型継手2を設置する。複数のT型継手2のそれぞれでは、継手ユニット3の上流側の端部30をT型継手2の第2通路6に接続したのち、該継手ユニット3の下流側の端部31を天井7に既設の複数のスプリンクラーヘッド8それぞれの入口筒部8aに各別に接続する手順によりなされる。   The fitting 1 for connecting the sprinkler head for water connection having the above-described configuration is performed by first supplying water pipes at both ends of the linear first passage 4 in the T-shaped joint 2 with the water stopper 11 closed. By inserting 5 and making a watertight connection, a plurality of T-shaped joints 2 are installed in the middle of the water supply pipe 5. In each of the plurality of T-shaped joints 2, after connecting the upstream end 30 of the joint unit 3 to the second passage 6 of the T-shaped joint 2, the downstream end 31 of the joint unit 3 is connected to the ceiling 7. This is done by a procedure for connecting each of the plurality of existing sprinkler heads 8 to the inlet cylinder 8a.

このように水道連結用スプリンクラーヘッド接続用の継手1を取付けた状態では、給水管5、T型継手2、継手ユニット3およびスプリンクラーヘッド8の内部は大気圧に保持される。ここで、止水栓11を開いて給水管5に通水し、給水管5末端の給水栓10からの放水を確認して給水栓10を閉じる。   Thus, in the state where the joint 1 for connecting the sprinkler head for water supply connection is attached, the interiors of the water supply pipe 5, the T-type joint 2, the joint unit 3 and the sprinkler head 8 are maintained at atmospheric pressure. Here, the water stopcock 11 is opened and water is passed through the water supply pipe 5, water discharge from the water supply pipe 10 at the end of the water supply pipe 5 is confirmed, and the water supply cock 10 is closed.

上水道本管9の水道水が給水管5に通水されることで、水道水の水圧が継手ユニット3の上流側の端部30に備わっている逆止弁からなる逆流防止手段12の弁体16に1次圧P1として負荷される。1次圧P1が逆流防止手段12の弁体16に負荷された初期の状態では、弁体16に負荷される2次圧P2は大気圧で前記1次圧P1よりも低いので、弁体16は1次圧P1と2次圧P2との差圧(P1>P2)でスプリング18の付勢に抗して開放される。これにより、弁体16下流側の継手ユニット3およびスプリンクラーヘッド8内の空気は水道水に置換され、置換された水道水の水圧が弁体16に2次圧P2として負荷されることで1次圧P1と2次圧P2とが平衡し、スプリング18の付勢により弁体16が環状の弁座13に着座して閉止される。この場合、弁体16下流側の継手ユニット3およびスプリンクラーヘッド8内に停滞水が発生するものの、この停滞水の給水管5への逆流は弁体16の閉止、つまり逆止弁からなる逆流防止手段12の閉止によって確実に防止される。   The tap water of the water supply main 9 is passed through the water supply pipe 5 so that the water pressure of the tap water is composed of a check valve provided at the end 30 on the upstream side of the joint unit 3. 16 is loaded as the primary pressure P1. In the initial state in which the primary pressure P1 is applied to the valve body 16 of the backflow prevention means 12, the secondary pressure P2 applied to the valve body 16 is atmospheric pressure and is lower than the primary pressure P1. Is released against the bias of the spring 18 by a differential pressure (P1> P2) between the primary pressure P1 and the secondary pressure P2. As a result, the air in the joint unit 3 and the sprinkler head 8 on the downstream side of the valve body 16 is replaced with tap water, and the water pressure of the replaced tap water is loaded on the valve body 16 as the secondary pressure P2 to perform the primary. The pressure P1 and the secondary pressure P2 are balanced, and the valve body 16 is seated on the annular valve seat 13 by the urging of the spring 18, and is closed. In this case, although stagnant water is generated in the joint unit 3 and the sprinkler head 8 on the downstream side of the valve body 16, the backflow of the stagnant water to the water supply pipe 5 closes the valve body 16, that is, prevents backflow consisting of a check valve. This is reliably prevented by closing the means 12.

平常時において、給水管5の末端に取付けられている給水栓10を開放することで、給水管5内の水道水は給水栓10から放水されて、飲用や炊飯、洗濯やバスタブあるいはトイレの水洗などに供給される。このような状態下でも前記1次圧P1と2次圧P2の平衡状態が保持されて前記逆流防止手段12は閉止されているので、前記停滞水が給水管5へ逆流することはない。   In normal times, by opening the water tap 10 attached to the end of the water supply pipe 5, the tap water in the water supply pipe 5 is discharged from the water tap 10 and can be used for drinking, cooking, washing, washing the bathtub or toilet. Etc. Even in such a state, since the equilibrium state of the primary pressure P1 and the secondary pressure P2 is maintained and the backflow prevention means 12 is closed, the stagnant water does not flow back to the water supply pipe 5.

火災発生時には、スプリンクラーヘッド8から、まず前記停滞水が自動的に放水される。これにより、2次圧P2が低下するので、弁体16は1次圧P1と2次圧P2との差圧(P1>P2)でスプリング18の付勢に抗して開放されてスプリンクラーヘッド8の放水を許容する。これにより、火災の抑制・消火を行い、初期消火に優れた効果を発揮することができる。   When a fire occurs, the stagnant water is automatically discharged from the sprinkler head 8 first. As a result, the secondary pressure P2 decreases, and the valve body 16 is released against the bias of the spring 18 by the differential pressure (P1> P2) between the primary pressure P1 and the secondary pressure P2, and the sprinkler head 8 Allow water discharge. Thereby, fire suppression and extinguishing can be performed, and the effect excellent in initial fire extinguishing can be exhibited.

T型継手の第2通路6は横向き水平に指向していること、つまり、図2に示す第2通路6の軸線Cが横向き水平に指向していることで、該第2通路6の軸線Cを鉛直下向きにした構造と比較して、平常時において、第1通路4から第2通路6に一旦流入した水は、第1通路4を流れる水の影響により再度第1通路4に流出し易くなる。そのため、第2通路6での滞留が回避されて第2通路6に停滞水が発生しなくなるので、第2通路6から第1通路4および給水管5へ停滞水が逆流することはない。   The second passage 6 of the T-shaped joint is oriented horizontally and horizontally, that is, the axis C of the second passage 6 shown in FIG. Compared with a vertically downward structure, the water once flowing from the first passage 4 into the second passage 6 is likely to flow out again into the first passage 4 due to the influence of the water flowing through the first passage 4 in normal times. Become. Therefore, stagnation in the second passage 6 is avoided and no stagnation water is generated in the second passage 6, so that the stagnation water does not flow backward from the second passage 6 to the first passage 4 and the water supply pipe 5.

なお、第2通路6の軸線Cは、前記横向き水平である状態を基準にして仰角10度・俯角5度の範囲に設定することが好ましい。仰角が10度を超えるとスプリンクラーヘッド8放水時の流水抵抗が大きくなり、俯角が5度を超えると第1通路4から第2通路6に一旦流入した水は再度第1通路4に流出し難くなるので第2通路6に停滞水が発生することになる。   The axis C of the second passage 6 is preferably set in a range of an elevation angle of 10 degrees and a depression angle of 5 degrees with respect to the horizontal horizontal state. When the elevation angle exceeds 10 degrees, the flow resistance when the sprinkler head 8 is discharged increases, and when the depression angle exceeds 5 degrees, the water once flowing into the second path 6 from the first passage 4 is unlikely to flow again into the first passage 4. Therefore, stagnant water is generated in the second passage 6.

以上のように、本考案に係る水道連結用スプリンクラーヘッド接続用の継手1は、T型継手2と、このT型継手2とスプリンクラーヘッド8とを接続する継手ユニット3とからなり、給水管5とスプリンクラーヘッド8とを接続するとともに、停滞水が給水管5へ逆流するのを確実に防止することができるものでありながら、T型継手2の第2通路6と継手ユニット3の上流側の端部30のいずれかに逆止弁からなる逆流防止手段12を備えただけのものであるから、部品点数の削減と構造の簡略化を実現できる。   As described above, the joint 1 for connecting a sprinkler head for water supply according to the present invention includes the T-type joint 2 and the joint unit 3 that connects the T-type joint 2 and the sprinkler head 8. And the sprinkler head 8 are connected to each other, and the stagnant water can be reliably prevented from flowing back to the water supply pipe 5, while the second passage 6 of the T-shaped joint 2 and the upstream side of the joint unit 3. Since only one of the end portions 30 is provided with the backflow prevention means 12 including a check valve, the number of parts can be reduced and the structure can be simplified.

また、前記継手ユニット3は、T型継手2の第2通路6に接続される管継手として機能するステンレス鋼製のニップルからなる第1継手32と、スプリンクラーヘッド8の入口筒部8aが接続される管継手として機能するステンレス鋼製のソケットからなる第2継手33と、第1継手32に上流側端部34aが接続され、第2継手33に下流側端部34bが接続されるとともに、上流側端部34aと下流側端部34bの間に蛇腹状の可撓部34cを有する可撓管34とを備えているので、可撓管34における可撓部34cの撓み作用によって第2継手33に大きい変位自由度が確保される。これにより、通常は、T型継手2の第2通路6に第1継手32を接続した後になされる天井7に既設のスプリンクラーヘッド8の入口筒部8aと第2継手33との芯合わせとそれに続く接続作業が容易になる。つまり、曲げ癖があるために真直度が損なわれている上に、硬度が高いので真直復元が困難な耐熱性に富むポリブデン樹脂製または架橋ポリエチレン樹脂製のパイプからなる従来既知の変位自由度の小さい継手ユニットを使用した構成と比較して、前記芯合わせとそれに続く接続作業がきわめて容易になる。   The joint unit 3 is connected to a first joint 32 made of a stainless steel nipple functioning as a pipe joint connected to the second passage 6 of the T-shaped joint 2 and an inlet tube portion 8a of the sprinkler head 8. A second joint 33 composed of a stainless steel socket that functions as a pipe joint, and an upstream end 34a connected to the first joint 32, a downstream end 34b connected to the second joint 33, and an upstream Since the flexible tube 34 having the bellows-like flexible portion 34c is provided between the side end portion 34a and the downstream side end portion 34b, the second joint 33 is caused by the bending action of the flexible portion 34c in the flexible tube 34. A large degree of displacement freedom is ensured. As a result, the centering of the inlet cylinder 8a of the existing sprinkler head 8 and the second joint 33 on the ceiling 7 which is normally performed after the first joint 32 is connected to the second passage 6 of the T-shaped joint 2, and the The subsequent connection work becomes easy. In other words, the straightness is impaired due to bending wrinkles, and the conventional displacement degree of freedom consisting of a pipe made of polybden resin or cross-linked polyethylene resin, which has high hardness and is difficult to restore straight, is highly heat resistant. Compared to a configuration using a small joint unit, the alignment and the subsequent connection work are very easy.

さらに、逆流防止手段12を、第1継手32の内周に設けた環状の弁座13と、スプリンクラーヘッド8閉塞時の1次圧P1と2次圧P2の平衡状態でスプリング18の付勢により環状の弁座13に着座するとともに、スプリンクラーヘッド8開放時における2次圧P2の低下によって生じる1次圧P1と2次圧P2との差圧(P1>P2)でスプリング18の付勢に抗して開放されてスプリンクラーヘッド8の放水を許容する弁体16とを備えた逆止弁によって構成しているので、部品点数が少なく、構造が簡単な逆止弁の逆流防止作用によって、停滞水が給水管に逆流するのを確実に防止することができる。   Further, the backflow prevention means 12 is urged by the spring 18 biased in an equilibrium state between the annular valve seat 13 provided on the inner periphery of the first joint 32 and the primary pressure P1 and the secondary pressure P2 when the sprinkler head 8 is closed. While seated on the annular valve seat 13, the pressure difference between the primary pressure P1 and the secondary pressure P2 (P1> P2) generated by the decrease in the secondary pressure P2 when the sprinkler head 8 is opened resists the bias of the spring 18. Since the check valve is provided with a valve body 16 that is opened and allows the sprinkler head 8 to discharge water, the check valve has a small number of parts and has a simple structure. Can be reliably prevented from flowing back into the water supply pipe.

なお、前記実施形態では、逆止弁からなる逆流防止手段12を継手ユニット3における第1継手32の内周に設けた構成で説明しているが、第1継手32の内周に代えてT型継手2の第2通路6の内周に、前記実施形態で説明した逆止弁と同じ構造の逆止弁からなる逆流防止手段12を設けた構成であっても、前記実施形態と同様の作用・効果を奏することができる。   In the above embodiment, the backflow prevention means 12 including a check valve is described as being provided on the inner periphery of the first joint 32 in the joint unit 3. Even in the configuration in which the backflow prevention means 12 including the check valve having the same structure as the check valve described in the above embodiment is provided on the inner periphery of the second passage 6 of the mold joint 2, the same as in the above embodiment. There are effects and effects.

また、逆流防止手段12を内周に設けた構成のニップルからなる第1継手32に代えて、逆流防止手段12を有していない通常のニップルを可撓管34の上流側端部34aに水密に接続するとともに、逆流防止手段12を内周に設けた構成で大径のニップルを別途用意し、この大径のニップルの後端部雌ねじを前記通常のニップルの先端部雄ねじに水密に接続した構成の継手ユニット3であってもよい。   Further, instead of the first joint 32 formed of a nipple having a configuration in which the backflow prevention means 12 is provided on the inner periphery, a normal nipple that does not have the backflow prevention means 12 is watertight at the upstream end 34 a of the flexible tube 34. In addition, a large-diameter nipple is separately prepared with a configuration in which the backflow prevention means 12 is provided on the inner periphery, and the rear end female screw of the large-diameter nipple is connected watertight to the front male screw of the normal nipple. The joint unit 3 having the configuration may be used.

上水道本管から分岐されている一般住宅の給水管を利用した水道連結用スプリンクラー設備において、前記給水管とスプリンクラーヘッドとを接続する継手およびスプリンクラーヘッド内の停滞水が給水管に逆流するのを防止するための水道連結用スプリンクラーヘッド接続用の継手である。   In a sprinkler facility for water connection using a water supply pipe of a general house that branches off from the water supply main, a joint that connects the water supply pipe and the sprinkler head and stagnant water in the sprinkler head are prevented from flowing back to the water supply pipe. This is a joint for connecting a sprinkler head for water connection.

1 水道連結用スプリンクラーヘッド接続用の継手
2 T型継手
3 継手ユニット
4 T型継手の第1通路
5 給水管
6 T型継手の第2通路
8 スプリンクラーヘッド
8a スプリンクラーヘッドの入口
9 上水道本管
10 給水栓
12 逆止弁(逆流防止手段)
13 弁座
16 弁体
18 スプリング(付勢部材)
30 継手ユニットの上流側の端部
31 継手ユニットの下流側の端部
32 第1継手
33 第2継手
34 可撓管
P1 1次圧
P2 2次圧
DESCRIPTION OF SYMBOLS 1 Joint for water connection sprinkler head 2 T type joint 3 Joint unit 4 First passage of T type joint 5 Water supply pipe 6 Second passage of T type joint 8 Sprinkler head 8a Inlet of sprinkler head 9 Water supply main pipe 10 Water supply Plug 12 Check valve (Backflow prevention means)
13 Valve seat 16 Valve body 18 Spring (biasing member)
30 End of upstream side of joint unit 31 End of downstream side of joint unit 32 First joint 33 Second joint 34 Flexible pipe P1 Primary pressure P2 Secondary pressure

Claims (4)

上水道本管から分岐されて端末に取付けられた給水栓の開閉により水道水を流動または停止させる給水管が両端部に接続される第1通路および該第1通路から分岐された第2通路を備えるT型継手と、上流側の端部が前記T型継手の第2通路に接続され、下流側の端部がスプリンクラーヘッドの入口に接続される継手ユニットとからなり、前記給水管と前記スプリンクラーヘッドとを接続する水道連結用スプリンクラーヘッド接続用の継手において、
前記T型継手の第2通路と前記継手ユニットの上流側の端部のいずれかに、スプリンクラーヘッド閉塞時の1次圧と2次圧との平衡状態で付勢部材の付勢により閉止されて、継手ユニットおよびスプリンクラーヘッド内の停滞水が前記給水管へ逆流を防止するとともに、
スプリンクラーヘッド開放時の2次圧の低下によって生じる1次圧と2次圧との差圧で前記付勢部材の付勢に抗して開放されてスプリンクラーヘッドの放水を許容する逆流防止手段を備えていることを特徴とする水道連結用スプリンクラーヘッド接続用の継手。
A water supply pipe that flows or stops tap water by opening and closing a water tap branched from the water supply main and attached to the terminal has a first passage connected to both ends, and a second passage branched from the first passage. The water supply pipe and the sprinkler head comprising a T-type joint and a joint unit having an upstream end connected to the second passage of the T-shaped joint and a downstream end connected to the inlet of the sprinkler head. In the joint for sprinkler head connection for water supply connecting
Either the second passage of the T-shaped joint or the upstream end of the joint unit is closed by the biasing member in a balanced state between the primary pressure and the secondary pressure when the sprinkler head is closed. The stagnant water in the joint unit and sprinkler head prevents back flow into the water supply pipe,
There is provided a backflow preventing means that is opened against the urging force of the urging member by the differential pressure between the primary pressure and the secondary pressure that is generated by the reduction of the secondary pressure when the sprinkler head is opened, and allows the sprinkler head to discharge water. A sprinkler head joint for water supply connection, characterized by
前記継手ユニットは、前記T型継手の第2通路に接続される管状の第1継手と、スプリンクラーヘッドの入口に接続される管状の第2継手と、前記第1継手に上流側の端部が接続され前記第2継手に下流側の端部が接続される可撓管とを備えてなる請求項1に記載の水道連結用スプリンクラーヘッド接続用の継手。   The joint unit includes a tubular first joint connected to the second passage of the T-shaped joint, a tubular second joint connected to the inlet of the sprinkler head, and an upstream end of the first joint. The joint for connecting a sprinkler head for water supply connection according to claim 1, further comprising a flexible pipe connected and connected to the second joint at a downstream end. 前記逆流防止手段は、前記第2通路と前記第1継手のいずれかの内周に設けた弁座と、スプリンクラーヘッド閉塞時の1次圧と2次圧の平衡状態でスプリングの付勢により前記弁座に着座するとともに、スプリンクラーヘッド開放時の2次圧の低下によって生じる1次圧と2次圧との差圧で前記スプリングの付勢に抗して開放されてスプリンクラーヘッドの放水を許容する弁体とを備えた逆止弁からなる請求項1または請求項2に記載の水道連結用スプリンクラーヘッド接続用の継手。   The backflow prevention means includes a valve seat provided on the inner circumference of either the second passage or the first joint, and a spring biased in a balanced state between the primary pressure and the secondary pressure when the sprinkler head is closed. While seated on the valve seat, the sprinkler head is allowed to discharge by being released against the urging force of the spring by the differential pressure between the primary pressure and the secondary pressure generated by the reduction of the secondary pressure when the sprinkler head is opened. The joint for sprinkler head connection for water supply connection of Claim 1 or Claim 2 which consists of a check valve provided with the valve body. 前記T型継手の第2通路の軸線は、横に向けて前記継手ユニットの上流側の端部に接続されてなる請求項1または請求項2に記載の水道連結用スプリンクラーヘッド接続用の継手。   3. The joint for connecting a sprinkler head for water supply connection according to claim 1, wherein an axis of the second passage of the T-shaped joint is connected to an upstream end of the joint unit in a lateral direction.
JP2009007770U 2009-10-30 2009-10-30 Fitting for sprinkler head connection for water supply connection Expired - Lifetime JP3156763U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009007770U JP3156763U (en) 2009-10-30 2009-10-30 Fitting for sprinkler head connection for water supply connection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009007770U JP3156763U (en) 2009-10-30 2009-10-30 Fitting for sprinkler head connection for water supply connection

Publications (1)

Publication Number Publication Date
JP3156763U true JP3156763U (en) 2010-01-14

Family

ID=54860523

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009007770U Expired - Lifetime JP3156763U (en) 2009-10-30 2009-10-30 Fitting for sprinkler head connection for water supply connection

Country Status (1)

Country Link
JP (1) JP3156763U (en)

Similar Documents

Publication Publication Date Title
US8037899B2 (en) Backflow preventer
HU217292B (en) Safety valve
AU2016262646A1 (en) Dual-purpose fluid control valve
JP2011153684A (en) Water hammer shock absorber
JP3156763U (en) Fitting for sprinkler head connection for water supply connection
JP3185852U (en) Fitting for sprinkler head connection for water supply connection
US20100181519A1 (en) Automatic switch valve
JP2010213825A (en) Fire extinguishing system
JP3161835U (en) Fittings for connecting water-coupled sprinkler heads
JP3218122U (en) Fittings for connecting water-coupled sprinkler heads
JP2006328793A (en) Piping structure
JP3187106U (en) Fittings for connecting water-coupled sprinkler heads
WO2010125392A1 (en) Fluid flow regulator with automatic shut off valve
GB2567247A (en) An improved shut-off valve for a sanitary fitting
JP2010133077A (en) Water storage tank
US6397878B1 (en) High pressure hose drop backflow/back siphonage preventers
JP5707469B1 (en) Flowing water detection device
JP2018075185A (en) Piping equipment for sprinkler
JP2016183714A (en) Fuse joint
CN213236207U (en) Gas water-filling-proof valve
US20140251643A1 (en) Device for introducing an agent into a fire suppression system
AU2018102096A4 (en) Safety cut off hose
KR200465322Y1 (en) a valve for alarm valve system
AU2007100374B4 (en) Fluid Flow Control Device
US20240151012A1 (en) Sanitary unit comprising a pressure-reducing valve

Legal Events

Date Code Title Description
R150 Certificate of patent or registration of utility model

Ref document number: 3156763

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121216

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131216

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term